Amazon BasicsAmazon Basics Rooftop Cargo Carrier Bag, Black, 424.8 litres, 15 cu. ft.

Arrived as described -works quite well. Took a bit of time to fit and load the 1st time - the buckles needed to be adjusted to length for my vehicle - wrapping the straps around the bars helped - good bit quicker the 2nd time. Good for a single long drive when you will be unloading at your destination. Not really suitable for touring where you need the contents every evening. Good solution for our once a year need for additional luggage carrying capacity to give the dog space in the boot / trunk. Much more cost effective than bars and a solid roof box and much easier to store when not in use. Best used with soft walled luggage as they can be squeezed in. Once filled and with all straps tightened and ends folded in was really secure on the roof between the longitudinal running bars (golf estate with stand off bars). Was water tight at 70mph on the A9 this week during heavy rain - be careful to install with zips to side and rear and use the velcro flaps to cover zips. I paired it with a non-slip mesh mat - to protect car roof and minimise possibility of slipping. All in all good value for what it is and met my expectations.

Product arrived very quickly, but that usual for Amazon. The bag itself is surprisingly brilliant. Like other reviewers, I sort of expected something fairly flimsy and "short-term-solution"-ish. It's actually brilliantly well-made. The material is very tough and thick, it's more like tarpaulin material than "backpack" material. It zips around 3 sides and opens like a clam. It fitted perfectly into our Streetwize Universal Roof Tray (120cm x 97cm) like it was designed for it. (We got that tray from Toolstation if anyone is interested, stick it in google. They pair really really well).Now, the straps...The straps are actually great. Really strong, well-sewn and tough. The buckles are nice and strong too. In my opinion, they are easy to adjust, BUT the key thing I'd say is that the first time you use the bag, stretch them all out to get them roughly stretched to the right length for your car setup, because it's this part that takes a while to sort out.I'd suggest doing this the night / day before you travel. When travelling time arrives, you can then throw the bag on, then put all your stuff in it while on the roof, close it up and buckle it on without having to faff with all the straps at this point. Once the straps are all about the right length, they are VERY easy to adjust once buckled and because there are 8 straps (2 for each side), they allow for very flexible packing.Point the non-zipped side forward into prevailing weather and it will be watertight. The zip line is really well covered by the zip cowl, which velcros down really well. It's really quiet on the move too if you tighten the straps taugtly.The bag rolls up into something the size of a deflated, folded up air matress, and has its own little waterproof bag with a carry handle, which can then be tucked into a cupboard or behind a seat in the car if need be.An absolute bargain for the price. If you're thinking of getting one of these instead of a bulky roof box, definitely do it.

4 stars only because quality control didn’t pick up a couple of the clips were upside down ( very easy to change around myself but regrettable to have to )Other than that it is, and has performed exactly as I expected - very well. Roof boxes are not as capacious, take up a lot of valuable real estate in my garage, are vastly more expensive, and as this will only be used for the odd weekends away and 2 family camping holidays a year and it packs away neatly into its small stowage bag, it is a great addition to our transportation requirements.Have already used it for 1 camping trip, where it did rain while driving to the site and it was weather tight- happy customer

Very pleased with purchase.Good quality , great size and fits my roof rack perfectly . Straps are good and fully adjustable Very pleased with it

Unfortunately the bag was too big for our small car's roof rack, however, as other reviews have said, it's a seriously good bag for the money. I have returned it, but only because it was too big, and have opted for individual Dry Bags instead. I think the best review photo I saw was from someone who is using it in the back of a pick-up truck. It's most definitely excellent value for money, and for a certain purpose, it was just unfortunate that it wasn't going to work for my particular situation. I would however, not hesitate in buying the bag again for a different application. The double opening zipper was, as reported by others, easy to use and of good sturdy quality, with a weather flap that velcros over the zip for added waterproofness. As noted by another reviewer, you do need to make sure that the area where the two zippers meet is facing backwards if it's on a car roof, to further ensure that no prevailing water coming towards your vehicle sneaks in between the two ends of the closed zip, despite the weather flap's existence. Really, it's an excellent bag. The Amazon branding, by the way, points forwards and backwards, that is how you know which way around it goes on your roof. Also, it refolds easily and the storage bag, which is made from the same material, is nicely over-sized so getting the roof bag back into its 'holdall' is easy too.

Used for 80 mile trip, bag stayed in place, straps were fiddly to tighten but held on nicely. Bag is roomy, we managed to fit large suitcase, large holdall, medium holdall and couple large shopping bags with towels etc. Trip back was wet but everything stayed dry.